Not locked, just os swapped to one that has red key availability. AND hp won't support these - at least that's what they keep telling me - don't think it's locked, but who knows anymore... I know their changing to a copperhead ecm OS - assumed boss? Roush spends a lot of time and money getting "their" tunes 50 state legal. The above one is a roush tune from the looks of PE fueling - something easy enough to change and gain a couple of ponies Whipple is making it to where they have a "direct line" to "their" provided installers to where they're "whipple - not the installers" are the only ones who can make changes to their tunes - don't think this will work as I've all ready seen too many problems with whipples tunes "especially the gm platforms" all though they do work reasonably quickly to fix their problems - at least "I" can fix the GM tunes. As previously stated, whipple was the first to discover the hp and other gains by changing the os's on the new ones... Just wish HPT would offer coverage, so I could fix some problems without having to wait or rely on "them" to fix them especially since a lot of the problems created by "their" tunes can't be fixed by them due to legal reasons SO your options are pretty much do the tune without the added benefits of the OS swap or do the OS swap, but have your hands bound by Roush or Whipple?